Disposable dual-action reciprocating pump assembly

Abstract

A pump device includes a rotary motor, a compartment for insertion of a disposable pump part, and one or more pulsation-reduction elements. The disposable pump part includes an input port, an output port, and a dual-action reciprocating assembly. The input port is configured for intaking fluid. The output port is configured for outputting the fluid. The dual-action reciprocating assembly is configured for pumping the fluid. The assembly includes a single piston and a rod configured to be coupled to the rotary motor, so as to drive the piston. The one or more pulsation-reduction elements are configured to reduce a pulsation in the outputted fluid, caused by the single-piston dual-action reciprocating assembly.

The invention claimed is: 
     
       1. A pump device, comprising:
 a rotary motor; and 
 a compartment; 
 a disposable pump part for insertion into the compartment, the disposable pump part comprising:
 an input port for intaking fluid; 
 an output port for outputting the fluid; and 
 a dual-action reciprocating assembly for pumping the fluid, the assembly comprising a single piston and a rod configured to be coupled to the rotary motor, so as to drive the piston to pump fluid through the output port at opposing directions of motion of the single piston; and 
 a guide hub and a bar, the guide hub configured to move in a reciprocating motion with the rod of the dual-action reciprocating assembly to reduce variations in motion speed of the single piston and thereby reduce a pulsation in the outputted fluid. 
 
 
     
     
       2. The pump device of  claim 1 , the guide hub comprising a guide channel, the bar being configured to rotate through the guide channel driven by the rotary motor. 
     
     
       3. The pump device of  claim 2 , a profile of the guide channel being configured to speed-up and slow down reciprocating motion of the rod by rotational movement of the bar. 
     
     
       4. The pump device of  claim 1 , further comprising a pulsation reduction element configured to reduce variations in motion speed of the single piston and thereby reduce the pulsation in the outputted fluid, the pulsation reduction element comprising one of:
 a balloon damper; and 
 a processor configured to vary rotation speed of the rotary motor. 
 
     
     
       5. The pump device of  claim 4 , the pulsation reduction element comprising the balloon damper. 
     
     
       6. The pump device of  claim 5 , the balloon damper being fitted in the output port of the pump part. 
     
     
       7. The pump device of  claim 5 , further comprising a second pulsation reduction element configured to reduce variations in motion speed of the single piston and thereby reduce the pulsation in the outputted fluid, the second pulsation element comprising the processor configured to vary the rotation speed of the rotary motor. 
     
     
       8. The pump device of  claim 4 , the pulsation reduction element comprising the processor configured to vary a rotation speed of the rotary motor. 
     
     
       9. The pump device of  claim 8 , further comprising a second pulsation reduction element configured to reduce variations in motion speed of the single piston and thereby reduce the pulsation in the outputted fluid, the second pulsation element comprising the balloon damper. 
     
     
       10. The pump device of  claim 8 , the processor being configured to drive the single piston at a constant speed through a central portion of reciprocal motion, accelerate approaching ends of reciprocal motion, decelerate and change directions at ends of reciprocal motion, accelerate away from ends of reciprocal motion, and decelerate to the constant speed through the central portion. 
     
     
       11. A disposable pump part for inserting into a compartment of a pump device, the disposable pump part comprising:
 an input port for intaking fluid; 
 an output port for outputting the fluid; and 
 a single-piston dual-action reciprocating assembly for pumping the fluid, the assembly comprising:
 a single piston; 
 non-return valves, configured to open and close interchangeably in response to the pumping by the single piston, so as to provide dual-action reciprocating pumping of fluid through the output port at opposing directions of motion of the single piston; and 
 a rod configured to be coupled to a rotary motor of the pump device, so as to drive the single piston; and 
 
 a guide hub and a bar, the guide hub configured to move in a reciprocating motion with the rod to reduce variations in motion speed of the single piston and thereby reduce a pulsation in the outputted fluid. 
 
     
     
       12. The disposable pump part of  claim 11 , the input port, the output port and the assembly being configured to be fitted in the pump device, and subsequently removed from the pump device at the end of use. 
     
     
       13. The disposable pump part of  claim 11 , further comprising a pulsation reduction element configured to reduce variations in motion speed of the single piston and thereby reduce the pulsation in the outputted fluid, the pulsation element comprising one of:
 a balloon damper; and 
 a processor configured to vary a rotation speed of the rotary motor. 
 
     
     
       14. The disposable pump part of  claim 11 , the disposable pump part being configured to drive the single piston at a constant speed through a central portion of reciprocal motion, accelerate approaching ends of reciprocal motion, decelerate and change directions at ends of reciprocal motion, accelerate away from ends of reciprocal motion, and decelerate to the constant speed through the central portion. 
     
     
       15. A manufacturing method, comprising:
 assembling a single-use pump part comprising:
 an input port for intaking fluid; 
 an output port for outputting the fluid; 
 a single-piston dual-action reciprocating assembly for pumping the fluid, the assembly comprising:
 non-return valves, configured to open and close interchangeably in response to the pumping to provide dual-action reciprocating pumping of fluid through the output port at opposing directions of motion of a piston; and 
 a rod configured to be coupled to a rotary motor, so as to drive the dual-action reciprocating assembly; and 
 a guide hub and a bar, the guide hub configured to move in a reciprocating motion with the rod to reduce variations in motion speed of the single piston and thereby reduce a pulsation in the outputted fluid; and 
 
 
 packaging the assembled pump part in a sterile package. 
 
     
     
       16. The manufacturing method of  claim 15 , further comprising
 positioning a bar such that the bar is configured to be driven by the rotary motor to rotate relative to the guide hub. 
 
     
     
       17. The manufacturing method of  claim 15 , further comprising:
 fitting O-rings into the single-use pump part. 
 
     
     
       18. A method, comprising:
 inserting a disposable single-piston dual-action reciprocating pump part into a compartment of a pump device, the pump part comprising:
 a rod configured to be coupled to a rotary motor of the pump device; and 
 a first pulsation reduction element configured to reduce variations in motion speed of the single piston and thereby reduce a pulsation in an outputted fluid, the first pulsation element comprising a guide hub and a bar, the guide hub being configured to move in a reciprocating motion with the rod of the dual-action reciprocating assembly; 
 
 connecting an input port of the pump part to a fluid supply; 
 connecting an output port to a fluid supply line of a medical device such that the disposable single-piston dual-action reciprocating pump part is configured to provide fluid through the output port at opposing directions of motion of the piston; and 
 operating the pump device from a control panel of the pump device. 
 
     
     
       19. The method of  claim 18 , the pump part further comprising a second pulsation reduction element configured to reduce variations in motion speed of the single piston and thereby reduce the pulsation in the outputted fluid, the second pulsation element being different from the first pulsation element and comprising one of:
 a balloon damper; and 
 a processor configured to vary a rotation speed of the rotary motor.